netfilter: ipset: Kconfig: ipset needs NETFILTER_NETLINK

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>

net/netfilter/ipset/Kconfig

 menuconfig IP_SET
 	tristate "IP set support"
 	depends on INET && NETFILTER
-	depends on NETFILTER_NETLINK
+	select NETFILTER_NETLINK
 	help
 	  This option adds IP set support to the kernel.
 	  In order to define and use the sets, you need the userspace utility